Atari 2600: Go Go Home Monster
Also known as Alien's Return.
An alien crashed on Earth and to get back to his planet he must find the four pieces of his spacecraft. Go into the several rooms and press the button. Hopefully, a piece of the ship will show on a corner of the screen. Pick it up and repeat the procedure until you can back home. Beware of the guardians, though, as they would follow you to trap you.